Question

Хелп плиз
Решить систему уравнение
{3x-5y/3 - x+2y/6=10
{7x-10y=62

Answer 1

Ответ:

y= -291/44          x= -13/22

Пошаговое объяснение:

$\left \{ {{3x-\frac{5}{3}y-x+\frac{2}{6}y=10} \atop {7x-10y=62}} \right.=\left \{ {{2x-\frac{8}{6}y=10 } \atop {7x-10y=62}} \right.=\left \{ {{-14x+\frac{56}{6}y=-70} \atop {14x-20y=124}} \right.=\left \{ {{-14x+\frac{28}{3}y=-70 } \atop {14x-20y=124}} \right.$

$\frac{88}{3}y=-194\\\\ y=-194:\frac{88}{3}\\\\y=-194*\frac{3}{88}\\\\ y=-\frac{291}{44}\\\\\\ 14x-20*(-\frac{291}{44})=124\\\\ 14x+\frac{2910}{22}=124\\\\ 14x=124-\frac{2910}{22}\\\\ 14x=\frac{2728}{22}-\frac{2910}{22} \\\\ 14x=-\frac{182}{22}\\\\ x=-\frac{182}{22}:14\\\\ x=-\frac{182}{22}*\frac{1}{14}\\\\ x=-\frac{26}{44}\\\\x=-\frac{13}{22}$